tree 991c071b48d4e049f6cf800a5fea12a6dfe989e2
parent 60720a0fc6469e8f924f85510c2a24ecc7bdaf9c
author Alex Williamson <alex.williamson@redhat.com> 1423260306 -0700
committer Alex Williamson <alex.williamson@redhat.com> 1423260306 -0700

vfio: Tie IOMMU group reference to vfio group

Move the iommu_group reference from the device to the vfio_group.
This ensures that the iommu_group persists as long as the vfio_group
remains.  This can be important if all of the device from an
iommu_group are removed, but we still have an outstanding vfio_group
reference; we can still walk the empty list of devices.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>